/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
define(["require", "exports"], function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    const toString = Object.prototype.toString;
    function defined(value) {
        return typeof value !== 'undefined';
    }
    exports.defined = defined;
    function boolean(value) {
        return value === true || value === false;
    }
    exports.boolean = boolean;
    function string(value) {
        return toString.call(value) === '[object String]';
    }
    exports.string = string;
});
